Electrospraying

Weekly presentation No. 1

A Brief Introduction to Electrospraying and Electrospinning

Presented by Rameshwar And Sunil Kumar

ElectrosprayingAtomization of liquid by electrical forces.

In this method a liquid droplet which is subjected to electrical shear force, passes from the nozzle at high voltage.

The size and charge of droplet can adjusted by controlling the flow rate and applied voltage on nozzle.

In electrospraying the droplet can be extremely small, like it may go down to nanometers.

The motion of electrically charged droplets (deflection and focusing) are controlled by electric field.

Electrospraying & Electrospinning A Common Setup

Needle

To Change the distance

Collector PlateCollector Voltage

Needle Voltage

Syringe Pump

Difference Between Electrospraying and Electrospinning

Electrospinning

Solution droplets comes out in the form of fibre jet.

In the formation of nano fibre.

Generally Viscous or viscoelastic solution used.

Electrospraying

Solution droplets comes out in the form of tinny droplets.

In the formation of nano particle.

Non viscous or non viscoelastic solution used.

Electrospraying with dye solution in water Parameters

Needle Voltage: 10KVCollector Voltage: 5KV

Distance: 25cmFlow rate: 1 ml/hr